View Full Version : B737 Stab Trim Switch(es)
oscarzulu737
23rd Jan 2011, 16:50
Can someone explain off of a reference why the trim switch on the control wheel is actually two switches side by side?
STBYRUD
23rd Jan 2011, 17:19
They prevent a runaway caused by one shorted or stuck switch. this way there are two breaker points in the circuit. (plus the cutout switches...)
blousky
23rd Jan 2011, 22:40
And you can even operate the trim with both switches in different directions!
Now try it and see which one give the direction input and which one just make contact.